Perfect for chilly early morning or evening runs, the Nike Element Flash Women's Long-Sleeve Running Top keeps you warm without overheating. A looser fit under the arms and through the body lets you wear it over a tank. Reflective graphics on the sleeves help you stand out. Stay Cool Throughout the upper back is a more open knit for breathability, helping to keep the fabric from clinging to your skin. A half-zip design lets you adjust for the right amount of ventilation, while allowing you to keep covered when you transition to post-run plans. Stay Comfortable Thumb holes keep the sleeves from shifting or flapping in the wind and add a little more coverage in cool weather.  Stay Dry The soft fabric features Dri-FIT Technology that wicks sweat away from your skin to the fabric's surface where it quickly evaporates.